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Relativistic continuum quasiparticle random-phase approximation in spherical nuclei

par Daoutidis, Ioannis ;Ring, Peter
Référence Physical review. C. Nuclear physics, 83, 4, 044303
Publication Publié, 2011-04

Article révisé par les pairs

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Résumé :

We have calculated the strength distributions of the dipole response in spherical nuclei, ranging all over the periodic table. The calculations were performed within two microscopic models: the discretized quasiparticle random-phase approximation and the continuum quasiparticle random-phase approximation, which takes into account the coupling of the single-particle continuum in an exact way. Pairing correlations are treated with the BCS model. In the calculations, two density functionals were used, namely, the PC-F1 and the DD-PC1. Both are based on relativistic point-coupling Lagrangians. It is explicitly shown that this model is capable of reproducing the giant- as well as the pygmy-dipole resonance for open-shell nuclei in a high level of quantitative agreement with the available experimental observations. © 2011 American Physical Society.